Spring harrow-tooth



(No Model.)

B. E. WHIPPLE. SPRING HARROW TOOTH.

No. 538,397. Patented Apr. 30, 18 5.

NVi nnegses: Inventor.

J Attorney.

UNITED STATES PATENT OFFICE.

EFFINGER E. WHIPPLE, OE S'II'JOHNS, MICHIGAN.

SPRING HARROW-TOOTH.

SPECIFICATION forming part of Letters Patent No. 533,397, dated April30,1895.

Application filed June 25, 1894. Serial No. 615,663. (No model.)

To aZZ whom it may concern.-

Be it known that I, EFFINGER E. WHIPPLE, of St. Johns, county ofClinton, and State of Michigan, have invented certain new and usefulImprovements in Spring Harrow-Teeth; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to theaccompanying drawings, in which like figures refer tolike parts.

This invention relates to a convenient, simple, and economical means ofeffectually se curing an independent point to a spring harrow tooth. Themeans-may form a part of the point which is preferable or may beseparate therefrom.

Independent harrow tooth points are needed to splice'worn out teeth andin order that when dull they may be readily removed and sharpened orotherwise disposed of, or new ones readily substituted for the old onesinstead of being compelled to throw away the whole spring tooth. Anotheradvantage in using the point is to provide a means of ready adjustmentof the points of all the teeth in the harrow that they may register witheach other, that is, extend down the same distance from the frame. Oldteeth which have worn considerable of their ends off must be thrown awayunless they can be supplemented by independent points. Withoutindependent points, spring harrow teeth willwear out irregularly. Onetooth will have to be removed to be sharpened and when sharpened, itwill be short. Some point fastening devices have been devised but theyhave been too complex, expensive, inconvenient or otherwiseobjectionable in use. As constructed the prior fastening devicesrequired the harrow tooth to be taken off the frame and holes punched ordrilled in them whereby the independent point could be bolted on. p

The full nature of my invention will appear from the followingdescription and the drawings forming a part hereof.

Figure 1 shows a spring harrow-tooth in side elevation with my pointsecured thereto. Fig. 2 is a rear View of the same, the top being brokenaway. Fig. 3 is a perspective of the rear of the point separate from thetooth, showing the fastening device. Fig. 4 shows the same as Fig. 2,with the eccentric fastener omitted. Fig. 5 shows a slightly-modifiedform wherein the fastening device is separate from the point. Fig. 6shows a slightly-modified form wherein the bolt is not provided with ahead or nut and the ears have elongated holes.

The spring tooth i is made in the ordinary way being widened at thelower end 2 as shown in Figs. 2 and 4. This widened lower end is foundin all standard spring harrow teeth, the end being sharpened byflattening as the teeth have worn away and is pointed like theindependent point 3 but the form of tooth after it is worn is like thatshown in the drawings. The independent point 3 is shaped like the lowerend of spring harrow teeth when new. The upper end of the point is aboutthe same widthas the harrow tooth above its enlargement 2. I provide onthe upper end of the point 3 two rearwardly extending ears 4 whose facesare smooth and fit snugly against either edge of the spring tooth asshown in the drawings. They are provided with holes at 5 through whichpasses a bolt 6 having a nut 7 thereon. The angle between the ear andthe body of the point should be squarely made in order that the rearsurface of the point may bear snugly against the front face of the lowerend of the tooth. Then by tightening the nut 7 whereby the ears 4.- aredrawn toward each other the independent point will be securely fastenedto the tooth. The independent point should be so placed on the tooththat the ears will be above the enlargement 2. The bolt 6 or anyequivalent means of drawing the ears 4 toward each other is then putthrough the ears behind the toothand the nut 7, if a screw bolt is used,is tightened to draw the ears toward each other and thus securely fastenthe point to the tooth as well as cause the body of the point to bearagainst the face of the tooth. In order to increase the bearing betweenthe faces of the independent point 3 and the tooth l, I place on thebolt 6 an eccentric 8 provided with a handle or finger piece 9 as shownin the drawings. The eccentric is so formed that when the handle orfinger piece is drawn upright as in Fig. 1 the widest part of theeccentric will extend against the face of the tooth 1 and tightly clampthe point and tooth together. This combined with the screw bolt makes afastening device as secure as bolts through the tooth and point andyetis far more convenient to operate and does not weaken the tooth byrequiring holes bored in it. The eccentric is readily operated requiringno wrench or other device and in many cases the nut on the screw boltneed not be tightened, the eccentric being sufficient to bind and holdthe two together, but on the other hand the screw bolt itself is oftensufficient to accomplish the purpose desired.

If it be desired to have a fastening device independent of either thetooth or point it can be made after the principle of my invention asshown in Fig. 5 consisting of the strap 10 provided with the ears andother parts as in my invention whereby the tooth and point may beclamped together either by clamping the edges with a screw bolt or thefaces of the parts with an eccentric, or both together. When the strap10 is used its edges in front should be beveled preferably. If it bedesired to dispense with the screw bolt the form shown in Fig. 6 may beadopted where the bolt 6 has bent ends adapted to enter the slot holes5. When the eccentric is turned the ends will bend forward so that theycannot escape and the eccentric will effectually secure the partstogether, while the curved ends of the bolt will tend to draw the earstoward each other clamping them against the edges of the tooth.

The essential feature of my invention however consists of the smoothfaced ears formed integral with the point preferably but independent ifdesired so as to be placed on spring harrow teeth in the form in whichwe find them Without any inconvenience, with a bolt or equivalent meansof drawing the ears to- Ward each other whereby the point can be securedon the tooth quickly and at any time or place or by any person. By thisconstruction, a farmer can put on independent points when desired, canremove them readily and sharpen them and replace them and if the lengthof the teeth needs adjustment, he can effect that result by raising orlowering the independent points.-

I do not wish to confine myself to the specific device shown forpressing the ears of the point against the tooth as it can be done byother and equivalent means without dearting from the true spirit of myinvention.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A harrow tooth comprising the shank 1 widened at its lower end, theremovable point 3 provided with rearwardly extending ears 4. far enoughapart that they will fit snugly on each side of the shank above thewidened end, and the bolt 6 extendingthrough the ears and provided witha nut whereby the ears may be drawn together to clamp the point on theshank securely, substantially as shown and described.

2. A spring harrow tooth comprising the shank 1, with its lower endsomewhat wid ened, the point 3 provided with ears 4: adapted to embracethe shank above its widened end, the bolt 6 extending through the earsand provided with a nut whereby the ears may be drawn toward each otherand the cam piece 8 mounted on the bolt and adapted to clamp the face ofthe point to the face of the shank securely, substantially as shown anddescribed.

In witness whereof I have hereunto set my hand this 29th day of May,1894.

EFFINGER E. WHIPPLE.

Witnesses:

M. MAUD WHIPPLE, HANNAH M. WHIPPLE.

